138967488 has 140 divisors (see below), whose sum is σ = 449576952. Its totient is φ = 42094080.

The previous prime is 138967483. The next prime is 138967489. The reversal of 138967488 is 884769831.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138967483) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 55806 + ... + 58242.

Almost surely, 2^138967488 is an apocalyptic number.

138967488 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138967488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (224788476).

138967488 is an abundant number, since it is smaller than the sum of its proper divisors (310609464).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138967488 is a wasteful number, since it uses less digits than its factorization.

138967488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2472 (or 2453 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The square root of 138967488 is about 11788.4472259921. The cubic root of 138967488 is about 517.9697561885.

The spelling of 138967488 in words is "one hundred thirty-eight million, nine hundred sixty-seven thousand, four hundred eighty-eight".